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CN118734611B - Step stress test method and system for electric energy meter under combined action of temperature, humidity and stress - Google Patents

Step stress test method and system for electric energy meter under combined action of temperature, humidity and stress Download PDF

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CN118734611B
CN118734611B CN202411223676.7A CN202411223676A CN118734611B CN 118734611 B CN118734611 B CN 118734611B CN 202411223676 A CN202411223676 A CN 202411223676A CN 118734611 B CN118734611 B CN 118734611B
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stress
temperature
humidity
test
electric energy
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CN118734611A (en
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李保婷
刘皓
邓凌翔
周雷
穆天驰
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Jiangsu Institute Of Econometrics (jiangsu Energy Measurement Data Center)
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Jiangsu Institute Of Econometrics (jiangsu Energy Measurement Data Center)
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    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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    • G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/04—Ageing analysis or optimisation against ageing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/08—Thermal analysis or thermal optimisation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces

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Abstract

本发明公开了一种温湿度应力共同作用下电能表步进应力试验方法及系统，根据温度和湿度信息建立电能表温湿度加速应力模型中的退化模型和建立电能表温湿度加速应力模型中的加速模型；利用预实验获得电能表温湿度应力极限；根据电能表温湿度应力极限确定各个试验施加应力；根据加速模型确定各个试验应力施加最小时间；根据确定的退化模型、各个试验施加应力和各个试验应力施加最小时间进行双交叉步进应力试验。本发明可弥补传统恒定应力试验方法对样本量要求高以及试验时间漫长的缺点，有效缩短了电能表加速退化试验的时间，减少了试验成本，提高了试验效率。

The present invention discloses a method and system for step stress testing of electric energy meters under the combined action of temperature, humidity and stress. The method includes establishing a degradation model in the temperature and humidity accelerated stress model of the electric energy meter and establishing an acceleration model in the temperature and humidity accelerated stress model of the electric energy meter according to temperature and humidity information; obtaining the temperature and humidity stress limit of the electric energy meter by using a preliminary experiment; determining the stress applied in each test according to the temperature and humidity stress limit of the electric energy meter; determining the minimum time for applying each test stress according to the acceleration model; and performing a double cross step stress test according to the determined degradation model, the stress applied in each test and the minimum time for applying each test stress. The present invention can make up for the shortcomings of the traditional constant stress test method in terms of high sample size requirements and long test time, effectively shorten the time of the accelerated degradation test of the electric energy meter, reduce the test cost, and improve the test efficiency.

Description

Step stress test method and system for electric energy meter under combined action of temperature and humidity stress
Technical Field
The invention relates to a stepping stress test method and system for an electric energy meter under the combined action of temperature and humidity stress, and belongs to the technical field of reliability evaluation.
Background
The intelligent electric energy meter is used as an important component of the intelligent power grid, is a final node of the intelligent power grid, accelerates the development of the intelligent electric energy meter, and has important significance for realizing informatization, automation and interaction of the power grid. With the improvement of the technical level and the rapid development of the intelligent power grid, the construction of the electricity consumption information acquisition system is more complete. As the basic element of the electricity consumption information acquisition system, the intelligent electric energy meter has the functions of data metering, acquisition, transmission and simple analysis. In consideration of environmental and element quality factors, life differences exist between installed electricity meters due to the influence of production time, process and batch. In addition, the prototype test of the ammeter before leaving the factory has stricter requirements from the aspects of time, equipment, environment and experience of testers. Therefore, how to accurately and conveniently predict the service life and evaluate the reliability of the ammeter is a problem to be solved urgently.
The accelerated degradation test can make full use of useful information of the product in the degradation test process, and extrapolate degradation data of the product under high stress level to normal stress level by a corresponding method, so as to evaluate the performance index of the product. The step stress acceleration degradation test has the advantage over the constant stress acceleration degradation test that the test sample is less than the constant stress acceleration degradation test and has higher efficiency than the constant stress acceleration degradation test.
Because the step stress accelerated degradation test is still in the exploring and developing stage, the related national standard is lacking. Therefore, the electric energy meter stepping stress test method under the combined action of temperature and humidity stress is beneficial to filling up relevant blank, providing necessary conditions for the subsequent effective evaluation of the reliability and service life of the electric energy meter stepping stress test method under the stress of temperature and humidity environments, and laying a foundation. The method can shorten the test period, improve the test efficiency, reduce the test cost and solve the problem of partial reliability evaluation of the electric energy meter under the environmental stress related to temperature and humidity.
Disclosure of Invention
The invention aims to solve the problem of partial reliability evaluation of an electric energy meter under the condition of environmental stress related to temperature and humidity.
The technical scheme adopted by the invention is as follows:
A stepping stress test method of an electric energy meter under the combined action of temperature and humidity stress comprises the following steps:
And step 1, acquiring temperature and humidity information in a test environment.
And 2, establishing a degradation model in the temperature and humidity acceleration stress model of the electric energy meter according to the temperature and humidity information.
And 3, establishing an acceleration model in the electric energy meter temperature and humidity acceleration stress model according to the temperature and humidity information.
And 4, obtaining the temperature and humidity stress limit of the electric energy meter by utilizing a pre-experiment.
And 5, determining the stress applied by each test according to the temperature and humidity stress limit of the electric energy meter.
And 6, determining the minimum time for applying each test stress according to the acceleration model.
And 7, performing a double-crossover stepping stress test according to the determined degradation model, the stress applied by each test and the minimum time for applying the stress by each test.
Preferably, the minimum time for each test stress application is determined in step 6 as follows:
wherein D min is the minimum test time, χ 2 (α,2r+2) is chi-square distribution, alpha is confidence, 2r+2 is degree of freedom, r is total number of test failures, Y is required service life, N is test sample size, F is accumulated failure rate, To the electromagnetic interference stress level under the conditions of use,Represents the percentage relative humidity under the conditions of use,Represents the percentage relative humidity under stress conditions,The number of powers is represented as a number of powers,The activation energy is indicated as such,Representing the boltzmann constant,Represents the thermodynamic temperature under stress conditions,Represents the thermodynamic temperature under the conditions of use.
Preferably, the degradation model in the step 2 is as follows:
;
Wherein X (t) represents the performance degradation amount, t represents the moment, mu is a drift parameter, sigma is a diffusion coefficient, B (t) is a standard Brownian motion, epsilon (t) represents a random measurement error, epsilon (t) is independently and uniformly distributed and has epsilon-N (0, sigma ε 2), In order for the drift parameter to be desirable,For the variance of the drift parameter,Error variance is measured randomly.
Preferably, in the step 5, the normal working stress and the limiting stress of the electric energy meter are substituted into an applied stress formula, the applied stress is determined, and the applied stress formula is as follows:
;
Wherein S 1、S2、S3 is 3 stress levels, S 0 is the upper limit of normal working stress, S max is the highest working stress, Is an intermediate variable.
The method for obtaining the temperature and humidity stress limit of the electric energy meter by utilizing the pre-experiment in the step 4 is preferred to conduct the pre-experiment on the electric energy meter with the same specification and batch as the electric energy meter to be tested, and the temperature limit stress and the humidity limit stress of the electric energy meter are respectively obtained.
Preferably, the electromagnetic interference stress level formula is as follows:
;
Wherein, To the electromagnetic interference stress level under the conditions of use,Is the disturbance voltage.
The invention further provides a step stress test system of an electric energy meter under the combined action of temperature and humidity stress, which is used for realizing the step stress test method of the electric energy meter under the combined action of temperature and humidity stress, and comprises an input unit, a degradation model unit, an acceleration model unit, a temperature and humidity stress limit unit, an applied stress determining unit, a stress applying minimum time unit and a double-cross step stress test unit, wherein:
the input unit is used for acquiring temperature and humidity information in the test environment.
And the degradation model unit is used for establishing a degradation model in the temperature and humidity acceleration stress model of the electric energy meter according to the temperature and humidity information.
And the acceleration model unit is used for establishing an acceleration model in the temperature and humidity acceleration stress model of the electric energy meter according to the temperature and humidity information.
The temperature and humidity stress limit unit is used for obtaining the temperature and humidity stress limit of the electric energy meter by utilizing a pre-experiment.
And the stress application determining unit is used for determining the stress application of each test according to the temperature and humidity stress limit of the electric energy meter.
And the stress application minimum time unit is used for determining the minimum time of each test stress application according to the acceleration model.
The double-crossover stepping stress test unit is used for carrying out double-crossover stepping stress test according to the determined degradation model, each test stress application and each test stress application minimum time.
It is a further object of the invention to provide a computer system comprising a memory for storing computer programs/instructions and a processor. The processor is used for executing the computer program/instruction to realize the electric energy meter stepping stress test method under the combined action of temperature and humidity stress.
Compared with the prior art, the invention has the following beneficial effects:
Firstly, the temperature and humidity stress limit of the electric energy meter is obtained through a pre-experiment, and then the electric energy meter is subjected to an accelerated degradation test through calculation by adopting a double-cross stepping stress test method. The method can overcome the defects of high requirement on sample size and long test time of the traditional constant stress test method, effectively shortens the time for accelerating the degradation test of the electric energy meter, reduces the test cost, improves the test efficiency, and solves the problem of evaluating partial reliability of the electric energy meter under the condition of involving the environmental stress of temperature and humidity.
Drawings
Fig. 1 is a flow chart of a step stress test of an electric energy meter under the combined action of temperature and humidity stress.
Detailed Description
The present application is further illustrated in the accompanying drawings and detailed description which are to be understood as being merely illustrative of the application and not limiting of its scope, and various equivalent modifications to the application will fall within the scope of the application as defined in the appended claims after reading the application.
The invention designs a stepping stress test method of an electric energy meter under the combined action of temperature and humidity stress, which is characterized by establishing a degradation model in an electric energy meter temperature and humidity acceleration stress model based on a Wiener process, establishing an acceleration model in the temperature and humidity acceleration stress model based on a generalized Eyring model, obtaining the temperature and humidity stress limit of the electric energy meter by utilizing a pre-experiment, substituting normal working stress and limiting stress of the electric energy meter into an applied stress calculation formula to determine each test applied stress, substituting each factor into a stress time calculation formula to determine the minimum time of each test stress application, and adopting a double-crossover stepping stress test method to perform an acceleration degradation test on the electric energy meter, as shown in figure 1, and specifically comprising the following steps:
And step 1, acquiring temperature and humidity information in a test environment.
And 2, establishing a degradation model in the temperature and humidity acceleration stress model of the electric energy meter according to the temperature and humidity information.
The Wiener process is used to describe the power meter degradation process and take into account the effects of measurement errors in the degradation model.
Typically, the performance degradation of the product will show an increasing trend away from the original point, and then the random motion process away from the original point can be described by adding a drift term to the standard brownian motion, and the specific expression of the performance degradation process is as follows:
(1)
Where X (t) represents the amount of performance degradation, μ is a drift parameter, σ is a diffusion coefficient, and B (t) is a standard Brownian motion.
Because of the limitation of the performance of the signal acquisition equipment and the unavoidable interference of environmental factors, the finally acquired signal data of the electric energy meter can be influenced by random errors, and the influence of measurement errors is considered in the degradation model in order to ensure the accuracy of the model. Let ε represent the random measurement error, ε (t) is independently and uniformly distributed and has ε -N (0, σ ε 2). Then the performance degradation model expression after adding the measurement error term on the basis of the model is as follows:
(2)
Wherein X (t) represents the performance degradation amount, t represents the moment, mu is a drift parameter, sigma is a diffusion coefficient, B (t) is a standard Brownian motion, epsilon (t) represents a random measurement error, epsilon (t) is independently and uniformly distributed and has epsilon-N (0, sigma ε 2), In order for the drift parameter to be desirable,For the variance of the drift parameter,Error variance is measured randomly.
Depending on the nature of the Wiener process, the probability density function can be expressed as:
(3)
In the formula, The probability density is represented by a value representing,Representing the incremental amount of change in the degradation of the performance,The time of the change is indicated and,Represents the standard deviation of the performance degradation,Representing the performance degradation mean.
The corresponding cumulative distribution function is:
(4)
In the formula, The cumulative distribution function is represented as a function of the distribution, The probability is represented by a probability that,
Correspondingly, the reliability function R (t) of the electric energy meter is as follows:
(5)
wherein R (t) represents the reliability of the electric energy meter.
And 3, establishing an acceleration model in the electric energy meter temperature and humidity acceleration stress model according to the temperature and humidity information.
The generalized Eyring model further considers the influence of factors such as material properties, working conditions, activation energy and the like on the performance degradation rate of the test sample. The specific form is as follows:
(6)
In the formula, Characteristic parameters related to the performance degradation rate of the electric energy meter are represented,Representing the related parameter I of the performance degradation rate of the electric energy meter,The thermodynamic temperature is indicated as being the temperature of the fluid,Indicating a thermodynamic temperature related parameter, and,The activation energy is indicated as such,Representing the boltzmann constant,Representing a related parameter II of the performance degradation rate of the electric energy meter,Represents the stress outside the temperature and the stress,And representing the performance degradation rate related parameter III of the electric energy meter.
Let s=log (RH) on the basis of the generalized Eyring model, where RH represents relative humidity, let m=0, and when the interaction between temperature and humidity is not considered, i.e. γ 3 =0, the model can be further simplified, the acceleration model is:
(7)
The model is also called Peck model, and the corresponding acceleration factor formula is:
(8)
In the formula, The acceleration factor is indicated as such,Indicating the relative humidity of the sample,The activation energy is indicated as such,Representing the boltzmann constant,The thermodynamic temperature is indicated as being the temperature of the fluid,Represents the percentage relative humidity under the conditions of use,Represents the percentage relative humidity under stress conditions,The number of powers is represented as a number of powers,Represents the thermodynamic temperature under the conditions of use,Representing the thermodynamic temperature under stress conditions. Activation energy E a =0.7, n=3.
And establishing an acceleration model based on the generalized Eyring model, and calculating an acceleration factor, so as to lay a foundation for the calculation of the stress applying time to be determined later.
And 4, obtaining the temperature and humidity stress limit of the electric energy meter by utilizing a pre-experiment.
And pre-experiment is carried out on the electric energy meters with the same specification and the same batch as the electric energy meters to be tested, and the temperature limit stress and the humidity limit stress of the electric energy meters are respectively obtained.
Other stresses of the test environment are guaranteed to be the stress of the intelligent electric energy meter under the normal working condition and are fixed. According to the structural characteristics of the intelligent electric energy meter and the early assembly and working experience, determining initial stress, step size and step duration of a step stress test, standing the electric energy meter for 3min between step sizes, continuously monitoring working states, and recording state parameters of the electric energy meter. When approaching the working limit stress, the step size is adjusted down appropriately. When the electric energy meter fails in a certain step length and returns the stress to the last step length, the fault meter resumes normal operation, and the stress is the limit stress of the electric energy meter, so that the normal operation stress upper limit S 0 and the highest operation stress S max are obtained.
And 5, determining the stress applied by each test.
Substituting normal working stress and limiting stress of the electric energy meter into an applied stress formula, determining the applied stress, wherein the applied stress formula is as follows:
(9)
Wherein S 1、S2、S3 is 3 stress levels, S 0 is the upper limit of normal working stress, S max is the highest working stress, Is an intermediate variable.
And 6, determining the minimum time for applying each test stress according to the acceleration model.
The minimum time for each test stress application was determined as follows:
(10)
Wherein D min is the minimum test time (in hours), χ 2 (α,2r+2) is chi-square distribution, Y is the required service life (in hours), alpha is the confidence level, alpha is the value of 1-CL, CL is the maximum value of the confidence level, 2r+2 is the degree of freedom, r is the total number of test failures, The comprehensive environmental factor is represented by N, the test sample size, F, the accumulated failure rate and AF.
When the coaction of multiple physical fields is considered, the temperature, the humidity and the electromagnetic stress are mutually coupled and overlapped to influence the effectiveness of the test result of the acceleration reliability, so that the comprehensive environmental factor about electromagnetic interference must be considered to solve the problem of deviation of the test result caused by the coupling of the multiple physical fields, and the formula of the comprehensive environmental factor about the electromagnetic interference is as follows:
(11)
(12)
Wherein, In order to integrate the environmental factors,To the electromagnetic interference stress level under the conditions of use,Is the disturbance voltage. According to formula (12), the electromagnetic interference stress level is that E c is equal to 1 when the interference voltage is less than or equal to 500V, E c is equal to 2 when the interference voltage is more than 500 and less than or equal to 1000V, E c is equal to 3 when the interference voltage is more than 1000 and less than or equal to 2000V, E c is equal to 4 when the interference voltage is more than 2000 and less than or equal to 4000V, and E c is equal to 5 when the interference voltage is more than 4000.
Substituting the formula (11) and the formula (8) into the formula (10) and simplifying the formula:
(12)
The obtained minimum time formula of each test stress application is as follows:
(13)
Wherein D min is the minimum test time, χ 2 (α,2r+2) is chi-square distribution, Y is the required service life, alpha is the confidence, 2r+2 is the degree of freedom, r is the total number of test failures, N is the test sample size, F is the cumulative failure rate, To the electromagnetic interference stress level under the conditions of use,Represents the percentage relative humidity under the conditions of use,Represents the percentage relative humidity under stress conditions,The number of powers is represented as a number of powers,The activation energy is indicated as such,Representing the boltzmann constant,Represents the thermodynamic temperature under stress conditions,Represents the thermodynamic temperature under the conditions of use.
And 7, performing a double-crossover stepping stress test according to the determined degradation model, the stress applied by each test and the minimum time for applying the stress by each test.
And (3) summarizing the calculation results of the acceleration factor obtained in the step (3), the limit stress obtained in the step (4), the stress application obtained in the step (5) and the minimum stress application time obtained in the step (6) to form a complete double-cross stepping stress test scheme shown in the table 1, and then carrying out a double-cross stepping stress test.
Table 1 test protocol
Stress numbering Temperature (° C) Humidity (%) Acceleration factor AF Minimum time of stress application (h)
S0 80 85 238 798
S1 87 85 372 510
S2 87 90 442 430
S3 95 90 721 263
Smax 95 95 848 224
In another embodiment, an electric energy meter step stress test system under combined action of temperature and humidity stress is provided, which is used for realizing the electric energy meter step stress test method under combined action of temperature and humidity stress, and comprises an input unit, a degradation model unit, an acceleration model unit, a temperature and humidity stress limit unit, an applied stress determining unit, a stress applied minimum time unit and a double-cross step stress test unit, wherein:
the input unit is used for acquiring temperature and humidity information in the test environment.
And the degradation model unit is used for establishing a degradation model in the temperature and humidity acceleration stress model of the electric energy meter according to the temperature and humidity information.
And the acceleration model unit is used for establishing an acceleration model in the temperature and humidity acceleration stress model of the electric energy meter according to the temperature and humidity information.
The temperature and humidity stress limit unit is used for obtaining the temperature and humidity stress limit of the electric energy meter by utilizing a pre-experiment.
And the stress application determining unit is used for determining the stress application of each test according to the temperature and humidity stress limit of the electric energy meter.
And the stress application minimum time unit is used for determining the minimum time of each test stress application according to the acceleration model.
The double-crossover stepping stress test unit is used for carrying out double-crossover stepping stress test according to the determined degradation model, each test stress application and each test stress application minimum time.
In another embodiment, a computer system is provided that includes a memory for storing computer programs/instructions and a processor. The processor is used for executing the computer program/instruction to realize the electric energy meter stepping stress test method under the combined action of temperature and humidity stress.
The invention can make up for the defects of high requirement on sample size and long test time of the traditional constant stress test method, effectively shortens the time of the accelerated degradation test of the electric energy meter, reduces the test cost and improves the test efficiency.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (7)

1.一种温湿度应力共同作用下电能表步进应力试验方法，其特征在于，包括以下步骤：1. A step stress test method for an electric energy meter under the combined action of temperature, humidity and stress, characterized in that it comprises the following steps: 步骤1，获取试验环境中的温度和湿度信息；Step 1, obtaining temperature and humidity information in the test environment; 步骤2，根据温度和湿度信息建立电能表温湿度加速应力模型中的退化模型；Step 2: Establish a degradation model in the temperature and humidity accelerated stress model of the electric energy meter according to the temperature and humidity information; 步骤3，根据温度和湿度信息建立电能表温湿度加速应力模型中的加速模型；Step 3, establishing an acceleration model in the temperature and humidity acceleration stress model of the electric energy meter according to the temperature and humidity information; 步骤4，利用预实验获得电能表温湿度应力极限；Step 4, using a preliminary experiment to obtain the temperature and humidity stress limit of the electric energy meter; 步骤5，根据电能表温湿度应力极限确定各个试验施加应力；Step 5, determining the stress to be applied in each test according to the temperature and humidity stress limit of the electric energy meter; 步骤6，根据加速模型确定各个试验应力施加最小时间；Step 6, determining the minimum application time of each test stress according to the acceleration model; 确定各个试验应力施加最小时间公式如下：The formula for determining the minimum time for applying each test stress is as follows: 式中，Dmin为最小试验时间，χ2 (α,2r+2)为卡方分布，α为置信度，2r+2为自由度，r为试验失效总数，Y为要求使用寿命，N为试验样本量，F为累计故障率，为使用条件下的电磁干扰应力等级，表示使用条件下的百分比相对湿度，表示应力条件下的百分比相对湿度，表示幂次数，表示激活能，表示玻尔兹曼常数，表示应力条件下的热力学温度，表示使用条件下的热力学温度； Where D min is the minimum test time, χ 2 (α,2r+2) is the chi-square distribution, α is the confidence level, 2r+2 is the degree of freedom, r is the total number of test failures, Y is the required service life, N is the test sample size, F is the cumulative failure rate, is the electromagnetic interference stress level under the use conditions, Indicates the percentage relative humidity under the conditions of use, Expressed as percentage relative humidity under stress conditions, represents the power, represents the activation energy, represents the Boltzmann constant, represents the thermodynamic temperature under stress conditions, Indicates the thermodynamic temperature under the conditions of use; 步骤7，根据确定的退化模型、各个试验施加应力和各个试验应力施加最小时间进行双交叉步进应力试验。Step 7, performing a double cross step stress test according to the determined degradation model, each test applied stress and each test stress applied minimum time. 2.根据权利要求1所述温湿度应力共同作用下电能表步进应力试验方法，其特征在于：步骤2中退化模型为：2. The step stress test method for electric energy meter under the combined action of temperature, humidity and stress according to claim 1 is characterized in that: the degradation model in step 2 is: ； ; 式中，X(t)表示性能退化量，t表示时刻，μ为漂移参数，σ为扩散系数，B(t)为标准布朗运动，ε表示随机测量误差，ε(t)是独立同分布的且有ε~N(0,σε 2) ，为漂移参数期望，为漂移参数方差，为随机测量误差方差。Where X(t) represents the performance degradation, t represents the time, μ represents the drift parameter, σ represents the diffusion coefficient, B(t) represents the standard Brownian motion, ε represents the random measurement error, ε(t) is independent and identically distributed and has ε~N(0,σ ε 2 ) , is the expected drift parameter, is the drift parameter variance, is the random measurement error variance. 3.根据权利要求2所述温湿度应力共同作用下电能表步进应力试验方法，其特征在于：步骤5中将电能表正常工作应力与极限应力代入施加应力公式确定施加应力，施加应力公式如下：3. The step stress test method for electric energy meter under the combined action of temperature, humidity and stress according to claim 2 is characterized in that: in step 5, the normal working stress and the limit stress of the electric energy meter are substituted into the applied stress formula to determine the applied stress, and the applied stress formula is as follows: ； ; 式中，S1、S2、S3分别为3个应力水平， S0为正常工作应力上限， Smax为最高工作应力，为中间变量。In the formula, S1 , S2 , and S3 are three stress levels, S0 is the upper limit of normal working stress, Smax is the maximum working stress, is an intermediate variable. 4.根据权利要求3所述温湿度应力共同作用下电能表步进应力试验方法，其特征在于：步骤4中利用预实验获得电能表温湿度应力极限的方法：对与待测试电能表同规格同批次的电能表进行预实验，分别获得电能表温度极限应力和湿度极限应力。4. The step stress test method for an electric energy meter under the combined action of temperature, humidity and stress according to claim 3 is characterized in that: the method of obtaining the temperature and humidity stress limits of the electric energy meter by using a preliminary experiment in step 4: a preliminary experiment is conducted on electric energy meters of the same specification and batch as the electric energy meters to be tested, and the temperature limit stress and humidity limit stress of the electric energy meter are obtained respectively. 5.根据权利要求4所述温湿度应力共同作用下电能表步进应力试验方法，其特征在于：电磁干扰应力等级公式如下：5. According to the step stress test method of electric energy meter under the combined action of temperature, humidity and stress as described in claim 4, it is characterized in that: the electromagnetic interference stress level formula is as follows: ； ; 其中，为使用条件下的电磁干扰应力等级，为干扰电压。in, is the electromagnetic interference stress level under the use conditions, is the interference voltage. 6.一种温湿度应力共同作用下电能表步进应力试验系统，其特征在于：用于实现权利要求1-5任一所述的温湿度应力共同作用下电能表步进应力试验方法，包括输入单元、退化模型单元、加速模型单元、温湿度应力极限单元、施加应力确定单元、应力施加最小时间单元、双交叉步进应力试验单元，其中：6. A step stress test system for an electric energy meter under the combined action of temperature, humidity and stress, characterized in that it is used to implement the step stress test method for an electric energy meter under the combined action of temperature, humidity and stress as described in any one of claims 1 to 5, comprising an input unit, a degradation model unit, an acceleration model unit, a temperature and humidity stress limit unit, an applied stress determination unit, a stress application minimum time unit, and a double cross step stress test unit, wherein: 所述输入单元用于获取试验环境中的温度和湿度信息；The input unit is used to obtain temperature and humidity information in the test environment; 所述退化模型单元用于根据温度和湿度信息建立电能表温湿度加速应力模型中的退化模型；The degradation model unit is used to establish a degradation model in the temperature and humidity accelerated stress model of the electric energy meter according to the temperature and humidity information; 所述加速模型单元用于根据温度和湿度信息建立电能表温湿度加速应力模型中的加速模型；The acceleration model unit is used to establish an acceleration model in the temperature and humidity acceleration stress model of the electric energy meter according to the temperature and humidity information; 所述温湿度应力极限单元用于利用预实验获得电能表温湿度应力极限；The temperature and humidity stress limit unit is used to obtain the temperature and humidity stress limit of the electric energy meter by using a preliminary experiment; 所述施加应力确定单元用于根据电能表温湿度应力极限确定各个试验施加应力；The stress determination unit is used to determine the stress to be applied in each test according to the temperature and humidity stress limit of the electric energy meter; 所述应力施加最小时间单元用于根据加速模型确定各个试验应力施加最小时间；The stress application minimum time unit is used to determine the minimum stress application time for each test according to the acceleration model; 所述双交叉步进应力试验单元用于根据确定的退化模型、各个试验施加应力和各个试验应力施加最小时间进行双交叉步进应力试验。The double cross step stress test unit is used to perform a double cross step stress test according to a determined degradation model, stresses applied in each test and minimum stress application time in each test. 7.一种计算机系统，其特征在于，包括存储器和处理器，所述存储器用于存储计算机程序/指令；所述处理器用于执行所述计算机程序/指令以实现权利要求1-5任一所述的温湿度应力共同作用下电能表步进应力试验方法。7. A computer system, characterized in that it includes a memory and a processor, wherein the memory is used to store computer programs/instructions; and the processor is used to execute the computer programs/instructions to implement the step stress test method for an electric energy meter under the combined action of temperature and humidity stress as described in any one of claims 1-5.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108475847A (en) * 2016-01-21 2018-08-31 三星电子株式会社 Antenna equipment and electronic equipment including antenna equipment
CN109375143A (en) * 2018-08-30 2019-02-22 中国电力科学研究院有限公司 A method for determining the remaining life of a smart energy meter

Family Cites Families (2)

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US11589888B2 (en) * 2017-12-28 2023-02-28 Cilag Gmbh International Method for controlling smart energy devices

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108475847A (en) * 2016-01-21 2018-08-31 三星电子株式会社 Antenna equipment and electronic equipment including antenna equipment
CN109375143A (en) * 2018-08-30 2019-02-22 中国电力科学研究院有限公司 A method for determining the remaining life of a smart energy meter

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